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/*
* u_qc_ether.h -- interface to USB gadget "ethernet link" utilities
*
* Copyright (C) 2003-2005,2008 David Brownell
* Copyright (C) 2003-2004 Robert Schwebel, Benedikt Spranger
* Copyright (C) 2008 Nokia Corporation
* Copyright (c) 2012-2014, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef __U_QC_ETHER_H
#define __U_QC_ETHER_H
#include <linux/err.h>
#include <linux/if_ether.h>
#include <linux/usb/composite.h>
#include <linux/usb/cdc.h>
#include "gadget_chips.h"
/*
* This represents the USB side of an "ethernet" link, managed by a USB
* function which provides control and (maybe) framing. Two functions
* in different configurations could share the same ethernet link/netdev,
* using different host interaction models.
*
* There is a current limitation that only one instance of this link may
* be present in any given configuration. When that's a problem, network
* layer facilities can be used to package multiple logical links on this
* single "physical" one.
*
* This function is based on Ethernet-over-USB link layer utilities and
* contains MSM specific implementation.
*/
struct qc_gether {
struct usb_function func;
/* updated by gether_{connect,disconnect} */
struct eth_qc_dev *ioport;
/* endpoints handle full and/or high speeds */
struct usb_ep *in_ep;
struct usb_ep *out_ep;
bool is_zlp_ok;
u16 cdc_filter;
/* hooks for added framing, as needed for RNDIS and EEM. */
u32 header_len;
struct sk_buff *(*wrap)(struct qc_gether *port,
struct sk_buff *skb);
int (*unwrap)(struct qc_gether *port,
struct sk_buff *skb,
struct sk_buff_head *list);
/* called on network open/close */
void (*open)(struct qc_gether *);
void (*close)(struct qc_gether *);
};
/* netdev setup/teardown as directed by the gadget driver */
int gether_qc_setup(struct usb_gadget *g, u8 ethaddr[ETH_ALEN]);
void gether_qc_cleanup_name(const char *netname);
/* variant of gether_setup that allows customizing network device name */
int gether_qc_setup_name(struct usb_gadget *g, u8 ethaddr[ETH_ALEN],
const char *netname);
/* connect/disconnect is handled by individual functions */
struct net_device *gether_qc_connect_name(struct qc_gether *link,
const char *netname, bool netif_enable);
struct net_device *gether_qc_get_net(const char *netname);
void gether_qc_disconnect_name(struct qc_gether *link, const char *netname);
/* each configuration may bind one instance of an ethernet link */
int ecm_qc_bind_config(struct usb_configuration *c, u8 ethaddr[ETH_ALEN],
char *xport_name);
int
rndis_qc_bind_config_vendor(struct usb_configuration *c, u8 ethaddr[ETH_ALEN],
u32 vendorID, const char *manufacturer,
u8 maxPktPerXfer, u8 pkt_alignment_factor,
char *xport_name);
void gether_qc_get_macs(u8 dev_mac[ETH_ALEN], u8 host_mac[ETH_ALEN]);
#endif /* __U_QC_ETHER_H */
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